Electric brake for automobiles.



D. M. DAILEY., ELECTRIC BRAKE FOR AUTOMOBILES.

APPLICATION FILE'DJUNE 23, 1915.

Patented Mar. 21, 1916.

DAVID M. BAILEY, OF GAB-Y, INDIANA.

ELECTRIC BRAKE FOR AIITOIVIOBILES.

Specification of Letters Patent.

Patented Mar. 21, 1916.

Application filed June 23, 1915. Serial No. 35,967. I

T 0 all whom it may concern:

Be it known that 1, DAVID M. DAILEY, a citizen of the United States,residing at Gary, in the county of Lake and State of Indiana, haveinvented new and u eful Improvements in Electric Brakes for Automobiles,of which the following is a specification.

My invention relates to brakes and more particularly toelectro-magnetically operated brakes. k

The principal object of my inventlon is to provide an elcctro-magneticbraking mechanism which consists of a plurality of electromagnets soarranged and controlled as to permit a gradual application of the brakeand furthermore to insure a positive operation thereof in the event thatcertain of the electro-magnets become deenerg zed.

Another object of my invention is to provide a device of thls characterhaving guide members associated with the armature 1n such a manner as toprevent partial rotary movement thereof and consequent distorting orbreaking of the connection between the armature and the braking element.

With these objects in view, and others of a similar nature which willappear as the invention is more fully understood, the invention consistsin the features of construction and arrangement of parts hereinafterdescribed and claimed, reference being had to the accompanying drawings,in which Figure 1 is a vertical central section showing my deviceconnected to a brake elementof a motor vehicle. Fig. 2 is a transversesection taken through the line A-A. Fig. 3 is a detail view of one endwall of the cylinder showing the electro-magnets attached thereto. Fig.4 is a diagraminatical view of the circuit including the electro-magnetsand the rheostat.

v In the present instance I have shown device attached to the horizontalrod of the common form of band brake as is used on motor vehicles andthe like, the casing for my device being secured to the under side of abody of the vehicle.

Referring to the drawings in detail 1 designates a standard or supportwhich is bolted or secured to the under side ofthe body of the vehiclein any suitable'manner. Horizontally disposed upon the support 1 is acylinder or casing 52 which is made of any suitable non-magneticmaterial such as brass or copper. Secured to the inner face of the ityto each other, the outer series being spaced about the edge of the Wallfor purposes hereinafter described. Arranged within the casing inproximity of the electromagnets is an armature 5 which is of a diskformation and which is provided with radial slots or depressions'ti.These slots 6 receive guide rods 7 which are secured to the inner wallof the cylinder and are longitudinally disposed thereon. The guide rods7 are formed of non-magnetic material and may be cast with the casing ormade. separately therefrom and rigidly secured to the casing byanysuitable means. The end portions of the guide rods 7 and those endswhich are disposed adjacent the electro-magnets are provided withupwardly extending lugs 8 which act as abutments and limit the forwardmovement of the disk of the armature 5. Axially secured to the disk 5and projecting through the end wall 9 of the cas-.

ing 2 is a rod 10, the outer'end of which is provided with a yoke 10' toreceive a horizontal rod 1 of the braking mechanism.

In Fig. 4 I have shown a circuit 11 having a suitable source of energysuch as a battery 12, the electro-magnets 4 being arranged in parallel.13 represents the rheostat which permits the gradual application of thebrake for varying the resistance of the circuit and consequent varyingof the magnetic flux. It will be seen from the foregoing constructionthat when it is desired to apply the brakes the operator closes thecircuit through the rheostats .13. The armature 5 being disposed withinthe magnetic field of the electro-magnets 5, upon energizing the magnets4, the armature 5 is attracted thereby causing the rod 10 to moveforward and actuate the horizontal rod 1 which in turn tightens the bandabout the hub. In providing the armature with the radial depressionsadapted to move within the guideways 7 I have'prevented any possiblerotary movement of the armature which prevents any turning of the rod 10and consequent distorting or breaking of the llO with the poles of theelectro-magnets which if permitted to do so, would cause a mutual injuryto the electro-magnets and the armature. In arranging theelectro-magnets in circular concentric series I have uniformlydistributed them about the walls of the cylinder so as to obtain themaximum amount of pulling force. The outer'series of ma'g nets arearranged in spaced relation to allow the guide members to ,be disposedadjacent the end Wall of the cylinder;

I have formed a casing 2 and a 'guiderod 7 of non-magnetic material soas to cause the magnetic lines of force'which'emanate from a invention'Will be thoroughly understood without requiring a more extendedexplana-v ti'onand therefore the'same hasbeen omitted.

What is claimed is I 1. In an electro-magnetic brake mechanism,the-combination'with a brake element, of a cylinder, a rod connected tosaid elementand extending through one end wall.

of said cylinder, an armature formed on the opposite end of said rod,said armature having depressions'formedin the peripheral edge thereof,guide-rods secured to the inner wall ofvsaid cylinder and cooperatingwith" said depressions, and electro-magnets. arranged within saidcylinder and secured to the. opposite end wall thereof.

2. In an electro magnetic brake mechanism, the combination with a brakeelement, I

of a cylinder, arod connected to said ele- V ment and extending throughone end Wall of said cylinder, an armature formed on the opposite'end ofsaid rod, said armature havcluding said magnets in multiple, and a Irheostat in said circuit.-

In anelectro-magnetic. brake mechanism, the combination with a brakeelement,-

of a cylinder, a rod connected to said element and extending through oneend wall a of said cylinder, an armature formed on the opposite endofsaid rOdfs'aid armaturehaving depressions formed in the peripheraledge thereof, guide rods secured to the inner wall'of said cvlinderandcooperating with said depressions, lugs formed'on the inner extremitiesof-each of said guide; rods, and elect'romagnets arranged within saidcylinder and secured to the opposite end wall thereof, said lugs adaptedto limit the forward movement of said armature with respect to saidmagnet.

4. In an electro-magnetic brake'mechanism, the combination with a brakeelement, of a cylinder, a rod connected to said element'and' extendingthrough one wall of said cylinder, electromagnets arranged Within thecylinder and secured to the opposite end wall thereof,'an armatureconnected to one end of said rod and disposed within saidcylinder, meansmounted on said cylinder and cooperating with said armaturefor-preventing circumferential movement of thelatterr I In testimonywhereof I afiix my'signature in presenceof-two witnesses.

DAVID M. DAILEY.

Witnesses:

ANDREW JACKSON, MARY FRANZ.

